Glad to read this thread! I was just thinking of creating one for the MPC1000 then I came here and found this one 
My MPC 1000 has been collecting dust for 12 years but yesterday I installed the demo of JJOS2XL. Like the others said, it really is a new device with this custom firmware.
The only thing “missing” would be “probability / conditions” maybe ?
- Do you know if there’s a way to toggle automatic preview of the samples when in “Load mode” instead of having to hit “play” each time ?
I’m trying to solve an issue with the CF card right now. I got a 16GB CF card and I filled it with thousands of NI samples from Battery and Maschine, unfortunately, the MPC is having difficulties loading the samples, it’s very laggy with this card, it sometimes freezes for 3 or 5 seconds each time I navigate to a different folder.
I even bought a small software that converts audio files to 44.1 16bits mono (while keeping the folder structure) and adjusts and trim the filenames but this doesn’t fix the problem.